Mizuno expands its Pro Signature series with new Pro S-4 iron

Golf.com • 1 min read • Latest: Sep 3, 2026, 1:08 PM

Last updated Sep 3, 2026

Mizuno expands its Pro Signature series with new Pro S-4 iron

Summary

Mizuno is expanding its Pro Signature series golf club line with the addition of the new Pro S-4 irons. This launch marks the third iron model released in the series to date. The new club aims to address a previously unfilled role in the company's equipment lineup by functioning as a true players cavity-back iron. The announcement confirms the company's strategy to round out its professional-grade offerings for golfers. The Pro S-4 is positioned to fill the gap between existing models in the Signature collection.

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Key Details

•Mizuno is launching the new Pro S-4 iron model.
•The iron serves as the third addition to the Pro Signature series.
•The club is designed as a players cavity-back iron.
•The model fills a gap in the existing Signature series product range.

Latest Updates

1:08 PMGolf.com — Mizuno's Pro S-4 irons are the Signature Series' missing piece

What they're saying

"
Mizuno is launching the third iron into the Mizuno Pro Signature series, which finally fills the hole of a true players cavity-back. The post Mizuno’s Pro S-4 irons are the Signature Series’ missing piece appeared first on Golf.
— Golf.comby Jack Hirsh

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